When was the sixth studio album released in the United States by the first Australian pop music group to achieve major chart and sales success in the United Kingdom and the United States?
1968
-1
Section::::Abstract.
Seekers Seen in Green
41901566
-1
Section::::Abstract.
Seekers Seen in Green
41901566
-1
Section::::Abstract.
The Seekers
31085
-1
Section::::Abstract.
The Seekers
31085